Discharging paste.



UNITED STATES P TENT OFFICE.

KARL REINKING, OF LUDWIGSHAFEN-ON-THE-RHINE, GERMANY, ASSIGNOR TO BADISGHE ANILIN & SODA .FABRIK, OF LUDWIGSHAFEN-ON THE-RHINE, GERMANY, A CORPORA- TION ,OF GERMANY.-

DISCHARGING PASTE.

No. 871,629. Specification of Application filed February Letters Patent.

1. 1905. Serial No. 243.747-

Patented Nov. 19, 1907 To all whom it may concern: v

' Be it known that I, KARL REINKING, doctor of philosophy and chemist, a subiect of the Prince Regent of Brunswick, residin at Ludwigshafen-on-the Rhine, in the King om of Bavaria, German Empire, have invented new and useful Im rovements in Discharging In the specification of Letters Patent No.

r 744,501 there is described the preparation of discharging pastes containing hydrosulfites.

These pastes, however, leave much to be desired with'regard to their stability. I have now discovered that dischar ing pastes which are much more stable and w 'ch also possess an excellent discharging power can be obtained if in the preparation thereof water be entirely, or almost entirely, excluded. This can be effected in the first lace by employing, instead of the usual tliickening, in the pre aration of which water has been used,- a t ckemng contaimng no water, or pract1 calli no water, prepared by mixing the usual thic ening agent. (such, for instance, as.

starch, burnt starch, and dextrin) with'an organic liquid, for example, glycerin, which has the ower of dissolvin extrin, or of causing the different kinds 0? starch to swell, and in the second place in making use either of dry anhydrous hydrosulfite, or of a paste of such hydrosulfite containin no water.

The organic liquid which l have found most suitable for the purposes of my invention is glycerin and' especlally crude glycerin on account of 1ts cheapness.

An advantage of my invention is that, when producing colored discharges, the coloring matter and -its. fixing agent can also be dissolved in the glycerin. The other additions to the discharging pastes which are described in the specification of Letters Patent No. 744,501 can also be made to these new pastes if desired.

The followlng examples will serve to further illustrate the nature .of this invention, which, however, is not confined to these exam Ice. The parts are by weight.

'lazample of the preparation of a thicken- I 'i/ng.Boil together for ten (10) minutes three (3) parts of wheat starch, nine (9) parts of dextrin and forty-eight (48) parts of cru'de glycerin.

Examples of the pre arat'ion of discharging pastes.(a) Stir wel together, to a fine paste, fortytwo (42) parts of a zinc-sodium double salt of hydrosulfurous acid in powder, eighteen (18) parts of crude glycerin (of twent -eight'(28) degrees Baum) and forty parts of glycerin thickening pre ared according to the foregoing example. rir t this onto the material, dry, steam for three (3) minutes, and wash and soap.

(b) Grind together, to afine paste, forty-..

four (44) parts of glycerin thickening prepared according to the foregoin examples eleven (11) arts of caustic so a solution (containin a out forty-one (41) per cent. of NaOH), t rt (30) parts of powdered so dium hydrosuliite, and fifteen (15) parts of Now whatI claim is:v

1. As a new article of manufacture a discharging paste containing an anhydrous hydrosulfite, glycerin and less than ten per cent. of water. a

2. As a new article of manufacture a discharging paste containing an anhydrous hydrosulfite, glycerin, wh'eat starch and dextrin and less than ten per cent. of water.

3. As a new article of manufacturea discharging paste containing forty-four parts of glfycerin thickening (composed of three parts 0 forty-eight parts of glycerin), eleven parts of caustic soda solution (containing forty-one 'per cent. of NaOH), thirty parts of sodium 'hydrosulfite and fifteen parts of glycerin.

In testimony whereof I have hereunto set witnesses.

Witnesses:

J. ALEC. LLOYD, Jos'. H. Lnurn.

glycerin. Print this onto the material, dry, stealrlnfor four (4) minutes, and soap and was wheat-starch, nine parts of dcxtrin and my hand in the presence of two subscribing 

